Concrete-construction apparatus.



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S. L. FRASER & A. E. IACOBSN. CONCRETE CONSTRUCTION APPARATUS.

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WITNESSES:

coLllMmA PLANomzAxn cn., WASHINGTON, n.

S. L. FRASER- & A. E. IACOBSON. CONCRETE CONSTRUCTION APPARATUS.

APPLICATION FILED MAY 20. 1913.

Patented Dec. 28, 1915.

4 2 SHEETS-SHEET 2.

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COLUMBIA PLANouRAPu c0..w^SHxNGToN. D, c.

SPENCER L. FRASER AND AXELE. JACOBSON, OF MINNEAPOLIS, MINNESOTA.

CONCRETE-CONSTRUCTION APPARATUS.

License.

Application filed May 20, 1913.

To all whom t may concern Y Be it known that we, SPENCER LEE FRASER andAXEL E. JAcoBsoN, both citizens of the United States, residing inMinneapolis, in the county of Hennepin and State of l\'linnesota, haveinvented certain newA and useful Improvements in Concrete-ConstructionApparatus, of which the following is a speciication.

rIhis invention relates to apparatus for use in concrete construction,and hasv for an object to provide a form of variable size so that itsdiameter may be varied as occasion may demand, and also to provide aself-contained working structure.' Further, there is provided a platformfor workmen, and forms and hoisting mecha- Y nism which may be raised asthe work `proceeds.

The invention is particularly applicable for use in building hollowcylindrical structures such, for instance, as tanks or silos.

In the drawings accompanying this speciiication a practicable embodimentof the invention is illustrated, wherein- Figure l is a perspective viewof the device set up for use, part of the form being broken away to showthe concrete structure within it. Fig. 2 is a view on a larger scaleshowing one side of the form in cross-section and illustrating a cranesupport and radial arms and other features in elevation; certain partsof the crane and crane support are also shown in section. Fig. 3 is anenlarged horizontal section taken on the plane at the line 3*-3 of Fig.2. Fig. 4 is a section through the crane support and post taken in avertical plane. Fig. 5 is a cross-section taken on a plane at about theline 5-5, Fig. 2. Fig. 6 is across-section taken on a plane at about theline 6h63, Fig. 6; and Fig. 7 is a detail of the connecting devices forthe panels and shows the interchangeable spacing blocks.

When the invention is used in connection with an apparatus for buildinga hollow cylindrical body such, for instance, as a silo, Jdiere will beprovided an inner and an outer annular form, which will be raised asvthework proceeds. These forms are made up of a series of panels orsections, 7, 8, which will Specicaton of Letters Patent.

Patented Dec. 28,1915. Serial No. 768,717.

be of some sufficiently flexible material that they may be flexed intothe proper curvature. The sections are interchangeable and may beincreased and decreased in number for increasing and decreasing thediameter of the structure which is to be formed. The ends of thepanelsof the forms are shown overlapping and secured together by suitabletransversely disposed connections. The connections shown comprise angleirons 9 riveted to the form panels a few inches inwardly of their ends.Between these angle irons are blocks 10 of hard-wood and passing throughthe angle irons and the interposed blocks are bolts 100 for effecting asmall amount of adiustment of each of the forms. Interchangeable blocksof varying width may be provided. This is illustrated in Fig. 7 whereina block 101 narrower than the block 10 shown in Fig. 3 is illustrated.and the dotted line position 102 indicates a block wider than that shownin F ig. 3. W'hen a greater range of circumferential adjustment isdesired and can be formed by means of the interchangeable block, panelsof different length from those of the series will be employed. Each ofthe forms in the present illustration is shown made up of a series ofpanels of uniform length and one panel of uri-uniform length. In Fig. lthe panels 8 are of uniform length and panel 81 is shorter so also thepanels 7 are of uniform length and the panel 71 is shorter than are theothers of the series. When it is desired to remove the forms from thecompleted work the bolts 100 on the inner form will be tightened,thereby reducing the size of the inner form and the bolts 100 ontheouter form will be loosened, thereby enlarging the outer form. In thismanner the form will readily free itself from the work. The inner andouter forms are shown connected at suitable intervals by means ofstanchions. 11. Fach stanchion, which is a framework construction, iscarried by the block of an inner and a block of an outer connection.Upon the framework is shown mounted the raising device, which devicedoes not form a part of the present improvement and is not illustrated,except in a general way at 54 in Fig. 2. The frames ll are provided withbars or members 12 and 13, through which there are openings for thepassage of reinforcing rods le, which rods at these points are made useof as guides for the frames. Vhen the rods are Erst set in position theframes will serve to position them in the concrete. After this,-however,has been filled up to the top of the form, the rods will then serve asguides when the forms are raised. The forms are held in concentricrelation in the present illustration by the frames 11.

The form is shown held in proper position by a spider formed of a seriesof radial arms and braces which are adjustable in length to suit thevarying sizes of the forms. There is shown located centrally of the forma hub or socket 15, which will act as a support for the crane post 16which carries the crane 17. The socket 15 is provided at its topandbottom, which may be about on the plane of the top and bottom of theform', with' an outstanding` fiange carrying ay rail 18, which rail isprovided with a notch 19. This rail is for carrying the attaching heads2() for the stays and radial arms. When the number of arms isdetermined, the corresj'aonding number of heads 2O will be placed uponeach of the rails 18. The panels will be assembled and the ends ofadjacent panels connected. rl`he radial arms 21 will then be secured tothe upper heads 20 at their inner ends. and to the fr:4 mes 11 at theirouter ends. rlfhese arms, as well as the braces 22, Q3, are shown' madeup of a series of bars provided with bolt holes 2e, whereby the properlength is secured. The brace 23 will extend from the head 18 to the belt25 which secures the radial arm 21 to the frame 11. Brace 22 will extendfrom the bolt 26 (which connects the radial arm 21 to the upper head 20)to the lower portion of the frame 11. After "the heads Q0 have beenadjusted to their proper positions they may be secured at such positionsby means of stay bolts 27. The concrete will be brought tothe work inseme convenient manner, preferably in buckets with the assistance of thecraneV 17. Post 1G for carrying the crane' is shown made of tub'infw andpassing within the socket 15 and almost to the lower end thereof, butwith sufficient clearance that it may rotate freely. r1`he post 1G isprovided just above the head carrying the flange 2O with a liange 2S,which provides one face for a roller bearing, the other face beingprovided upon the fiange Q9; between such faces there is a series ofroller bearings SOfor sustaining the weight of the crane and permittingready rotation thereof.

The crane is longitudinally adjustable to correspond with thelongitudinal or radial adjustment of the radial arms 21, and also topermit the outer end of the crane to move out when a full bucket isbeing raised, and

to move in to permit the bucket to be emptied in the space between thetwo forms. A crane for this purpose comprises a platform portion 31which is fast to the head 32 of the post 1G, and is supported at itsouter end by means of a brace 33. 1t also comprises a movable portion34; which carries a rack 35. There is mounted upon the portion 31 of thecrane a pinion 36 in mesh with the rack 35, the shaft of which pinioncarries a hand crank 37. By this means the outer end of the cranemay bemoved in and out for the purpose of adjustment and for the purpose ofpermitting the more convenient handling of the concrete buckets. A cableis shown guided through the interior of the form to the crane also belowthe form and outwardly thereof. The outer end of the crane is shownprovided with a pulley 38 over which passes the cable 39, which alsopasses over a pulley e() mounted upon the head 32, in such a positionthat the cable will pass through the hollow interior of the post 16 andover aV pulley 11 preferably located at the bottom of the structure. Thecable from there will pass to some convenient operating device. rfhecable is shown provided with a bucket engaging device in the form of ahook. For the purpose of holding the crane in its adjusted position theshaft L12, which carries the pinion 36, is provided with a ratchet wheel13, which is engaged by a pawl 114 mounted upon the crane. rfhe fixedportion 31 of the crane is shown provided with rollers 45 for supportingthe weight of the movable part *and making the movement thereof free. v,Y

From the foregoing description it* will be apparent that structures ofvarious diameter may be made with'the same equipment by varying thenumber of panels employed inthe form, a-nd that, as the number of panelsis increased or decreased, the number of radial arms and stays may belikewiseva'ried. lt has been found desirable, in practice, to proportionthe parts so that for building 'ai hollow cylindrical structure, say forinstance, a silo, of a diameter of 10 feet, six of the alrins and six ofthe lframes will be provided, and when makingone'V of 16 feet diametereight arms and eight frames, and twelve of these arms and frames may beused with a silo of 20 feet diameter. ,Thus one set of form panels maybe used for structures of different diameters, and owing to the built-upcharacter of the radial arms the same equipment will be used for struc-Vtures of different sizes.

A platform 50 is shown mounted upon the arms or braces 21. This platformwill be used by the workmen for a. scaffolding upon which to standandupon which to have such tools and materials-as they may'needl Thisplatform, it will be seen, will be raised` with the raising of the formso that the entire structure, the forms, the crane and the platform,will be raised from time to time during the progress o1c the work as theconcrete 51 is built up in the form space.

Although but one practicable embodiment of the invention has beenillustrated, it will be apparent that changes may be made in thestructure within the scope of the claims without departing from thespirit of the invention.

Although the forms are illustrated as circular in outline it will beapparent that they may be given some other shape if occasion may demand.

The jack 54C illustrated in Fig. 2 furnishes a convenient means forraising the forms and spider. This particular jack is shown anddescribed in United States Letters Patent No. 1,044,659 issued to AxelE. Jacobson for ack ior raising concrete wall forms, November 19th,19.12.

W'e claim as our invention 1. 1n a concrete construction apparatus, thecombination with a series of form panels, of connect-ions uniting theends of adjacent panels, a hub, a series of arms of' adjustable lengthradiating from said hub, and stanchions adapted to serve as means forattachment between the said connections and arms.

2. rilhe combination with a form, of a crane support located within andsupported by the form, braces connecting the form and crane support, anda. platform resting upon the braces.

3. rlChe combination with a circular form of adjustable radius, ofradial supporting arms ot adjustable length connected thereu to at theirouter ends, a socket carried by the inner ends of such arms, a postrotatably mounted in such socket, a horizontally disposed crane carriedby the post, and means for longitudinally adjusting the crane radiallyo1 the ltorni.

el. rhe combination with a pair of circular forms located one within theother and spaced apart for forming an annular mold, each ,of said formsbeing composed of a series of panels, connections between the ends ofadjacent panels, a frame pivotally connected to the inner side of theinner connection and the outer side of the outer connection, a cranepost support, stays connecting such support to said frames, a crane postmounted in such support, and a crane mounted upon the post.

5. The combination with a form made up of a series of interchangeablepanels, av series of arms equal in number to the number of panels andconnected to the junctures between the same, a. central arm-carryingmember comprising a support of about the length of the width of thepanels, and provided top and bottoni with a flange carrying a rail, suchrail having a. recess at one point and a series or' heads correspondingin number to the number of arms carried by each such rail, and to whichthe arms are attached.

6. A concrete foundation apparatus, comprising an inner and an outerform, each form embodying a series of panels, the panels being formed ofsheet metal and provided with transversely disposed connecting devices,blocks of wood interposed between the connecting devices, boltstraversing the connecting devices and blocks, and a` series ofstanchions each connected to a block on the inner and a block on theouter form.

7. A concrete construction apparatus, comprising an inner and an outerform, each form embodying a series oi' panels, the panels being formedof sheet metal and provided with transversely disposed connectingdevices, spacing blocks of varying widths for being interchangeablyinterposed between the connecting devices, bolts for traversing theconnecting devices and blocks, and a series of' stanchions cach adaptedto be connected to a block on the inner and a block on the outer form.

8. A concrete construction apparatus, comprising an inner and an outerform, each form embodying a series of panels, the panels being formed ofsheet metal and pro vided with transversely disposed connecting devices,spacing blocks of varying widths for being interchangeably interposedbe-` tween the connecting devices, bolts for raversing the connectingdevices and blocks, a series of stanchions each adapted to be connectedto a block on the inner and a block on the outer form, and a spiderconnected to such stanchions for holding same in proper relation one tothe other.

9. A concrete construction apparatus, comprising an inner and an outerform, each form embodying a series of panels, the panels being formed ofsheet metal having overlapping ends and provided inwardly of such endswith connecting devices, blocks of wood interposed between theconnecting devices, bolts traversing the connecting deA vices andblocks, and a series of stanchions each connected to a block on theinner and a block on the outer form.

10. A concrete construction apparatus, comprising an inner and an outerform, each form embodying a series of panels, the panels being providedwith connecting devices, blocks interposed between the connectingdevices and secured thereto, a series of stanchions each connected to ablock on the inner and a block on the outer form, and a spider connectedto such stanchions for holding same in proper relation one to the other.

4g www@ 11. The combination with an inclosing form of a crane supportlocated Within the same and braces connecting the form and crane supportand carryng'the latter, and vmeans coperatng with said braces for rassignedour namesin the' presence of twosubscribing Witnesses. Y

SPENCER L. FRASER. AXEL E," JACOBSON.

ing the form, crane support and braces s- Witnesses: multaneously. F'.R. VILLEY, In Wltness whereof, We have hereunto H.C. BARNEY.

Copies of this patent may be obtained for five cents each, -byaddressingche Commissioner of Patents, Washington, D. C.

